<template>
  <div class="List" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper" v-for="item in hot" :key="item.id" @click="handleCityClick(item.name)">
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(item,key) in cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div class="item" v-for="innerItem in item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">
            {{innerItem.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  }
}
</script>

<style scoped lang="stylus">
  .List
    overflow hidden
    position absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0

  /*background red*/
  .title
    background: #eee
    color #666
    font-size .26rem
    border-top 1px solid #eee
    border-bottom 1px solid #eee
    padding: .2rem

  .button-list
    overflow hidden
    padding .1rem .6rem .1rem .1rem
    .button-wrapper
      float left
      width 33.33%
    .button
      margin: .1rem
      padding: .1rem 0
      text-align center
      border .02rem solid #ccc
      border-radius .06rem

  .item-list
    .item
      line-height .76rem
      color: #666
      padding-left: .2rem
      border-bottom 1px solid #eee
</style>
